Moriwaki MD250H vs Aprilia RS125 Shootout

[pplassm]

Why not just convert a 125/250 Mxer? Lace on some 17" wheels, drop the suspension, and voila, track bike for peanuts.

[MOKE1K]

Originally Posted by bagha

That was a very good article. I would love to know how a bike that is actually available to me compares to these ...

Thanks

In my opinion is albiet fun it wouldn't compair.

[Kevin_Duke]

Originally Posted by pplassm

Why not just convert a 125/250 Mxer? Lace on some 17" wheels, drop the suspension, and voila, track bike for peanuts.

There's no easy way to get a MX bike to handle roadracing corner speeds like a purpose-built track bike. A dirtbike's steering geometry and chassis stiffness are not meant for high speeds. Extensive modifications would be necessary unless the plan is to race a MiniGP type of series that races on slower, go-kart-type tracks.

[MOKE1K]

The biggest difference would be gearing. Iv done alot of trackdays at Jennings with motards, and even though our track favors smaller bikes the motards can never keep up with the faster guys. No top end.

[pplassm]

So all the hype about converting stock framed 450s into roadracers is bunk?

[MOKE1K]

No, but they have to be doing something to make the gearing longer. Could be achievible, possibly with sprockets.

[Kevin_Duke]

Originally Posted by pplassm

So all the hype about converting stock framed 450s into roadracers is bunk?

Not bunk. But they require a lot more than just bolting on some 17s.

[pplassm]

All I saw was an alternative front end and lowering the rear. Am I missing something.

Gearing is of, course, an issue, but even I can make custom sprockets if I have to.

[Kevin_Duke]

Originally Posted by pplassm

All I saw was an alternative front end and lowering the rear. Am I missing something.

Gearing is of, course, an issue, but even I can make custom sprockets if I have to.

Gearing, springs, damping, swingarm downslope, steering geometry, custom fairing, brakes, etc. I think even Gavin Trippe, the progenitor of the F450 class idea, says it would cost at least $12K to do up a 450 MXer properly as a roadracer.

[Dr_Sprocket]

Originally Posted by Kevin_Duke

Gearing, springs, damping, swingarm downslope, steering geometry, custom fairing, brakes, etc. I think even Gavin Trippe, the progenitor of the F450 class idea, says it would cost at least $12K to do up a 450 MXer properly as a roadracer.

Why would one ever want to do it, then? Why not just enter the Superstock class? It would be cheaper and the bikes are almost race-ready.